Concrete screw-pile for foundations and similar purposes.



G. G. VERNON-INKPEN.

CONCRETE SCREW PILE ECR ECUNDATICNS AND SIMILAR PURPOSES.

APPLICATION FILED DBO.13, 1912.

1,070,862, Patented Aug. 19, 1913.

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CONCRETE SCREW PILE ECE EOUNDATICNS AND SIMILAR PURPOSES.

APPLICATION FILED DEO.13. 1912.

1,070,862, Patented Aug. 19, 1913.

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GEORGE CHARLES vEENpN-INKPEN, or PORTSMOUTH, ENGLAND.'

CONCRETE SCREW-PILE FOR FOUNDATIONS AND SIMILAR PURPOSES.

Specification of Letters Patent. I Patented Aug. 19,1913.

Application filed December 13, 1912. Serial No. 736,454.

To all whom t may concern.'

Be it known that I, GEORGE CHARLES VER- NoN-INKPEN, a subject of the King of Great Britain, residing in Portsmouth, Hants,

England, have invented certain new and improvements in the concrete pile for whichV Letters Patent were granted to me on July 4, 1911, No. 996,668, which pile is made of reinforced concrete and intended for use in securing foundations for quays, walls, piers,`

columns, etc., either for Works of a subaqueous nature or in soils above the surface ofi Water, particularly through marshy or boggy strata, mud, loose or running sand or other soft soils, in order to secure a solid and-firmfoundation for carrying erections, Works, super-structures, supports or the like.

soft soils for securingr anchor-foundations for holding down structures such as large sheds for aeroplanes, warehouses, stores, fac- `tories and similar buildings erected with lifrht materials in exposed situations and su ject to much wind pressure, also to columns and the like for carrying telegraphic wires, cables, signals or similar purposes requiring a firm foundation in the soil.

My invention consists in concrete screwpiles in which spiral flanges, Worms or vblades of reinforced concrete form an integral part of the concrete pile-body or shaft proper, and which by the application of continuous helical metallic bars, rods, bands or wrappings embedded in the concrete and possessing strength and efficiency, resist a twisting or torsional strain in conjunction with a suitable continuous vertical reinforcement of the concrete pile-shaft, and in which also means are provided for securing to the reinforced concrete pile-shaft metal incasements or molds as protection to the concrete spiral anges, worms or blades of the screw, as hereafter described.

For the purpose of this invention concrete in combination with steel is employed, as hereafter set' forth, in the construction of the piles which are capable of being formed and made, if desired, at or nea-r the places where they are required to be used, preferably where the materials for the concrete can be obtained cheapest and at the least cost for carriage.

In the construction of the pile either at its base, along its length, or in both positions 1f requlred, one or more blades or flanges are formed in conjunction with the shaft as a screw, the pitch of the blades or the worm of the screw varying, the blades projecting more or less from the body of the shaft, accordlng as the. circumstances and uses for which the pile may be required and according to the depth` of soil or strata into which the pile is intended to penetrate. In fixing screw-piles into position, they may penetrate a fairly solid stratum near the surface and afterward pass into a bed of running or soft sand before finding a lower solid founda-` tion upon which the end of the pile may rest, while the upper blades or flanges of the screw could Valso receive support from an upper stratum.

The piles are screwed directly into the soil or into holes previously prepared to The invention is also applicable for use inY receive them and also removed when so required, by means such as are usually and customarilyused, such as wheels, Winches, capstans and the like, for which purpose it 1 is intended to form along the length of the shaft of the pile one or more depressed key- Ways, to receive a movable wheel or'other contrivance which could be secured to the shaft for imparting a rotary motion to the pile for raising, lowering or removing it as desired.

In order that my invention may be better understood, reference is made to the accompanying drawings, which illustrate my improved screw-pile and its reinforcement, and in which Figure 1 is a vertical section of the lower screw-portion of the pile, through the center of the shaft, Fig. 2 a horizontal sectional plan of Fig. 1 through the worm or screw .of the pile, and Figs. 3, 4 and 5 are sideelevations of different forms of my improved screw-pile. l f

Similar letters of reference indicate corresponding parts.

Referring to the drawings, a, represents the concrete center of the pile-shaft within l the reinforcement, b the concrete outside the reinforcement of the pile-shaft, b" the concrete forming the blade of the screw, c a vertical reinforcement of the pile-shaft, preferably an envelop or wrapping of a sheet of expanded metal, perforated sheetsteel overlapped at the edges, or interlaced steel-rods or the like, d the outer face of the pile-shaft, e the outer edge of the`concrete y flanges of the screw-blade, f radiating metal twisted or other suitable section, preferably l' reinforcing arms extending from the pileshaft to the ring g nearto the outer edge of the concrete flange, f metal reinforcing arms which extend from the pile-shaft but tangential thereto and secured at, their outer ends to the ring g. The ring g -is'formed of a reinforcing metal spiral encircling the screw-blades in the direction of the' pitch of the screw, g a metal spiral encircling the reinforcement of the pile ih the direction of the pitch of the screw, k a helical reinforcing coil of the pile-shaft to resist torsion, wound in the reverse direction to that of the screwthread, being continuous in length and preferably formed with a number of metal rods, interlaced or otherwise or perforated or expanded metal, strands of wire or bands.

In the drawings only a limited number of radiating and tangent arms are shown; the number may be increased by others, or reduced or supplemented in the manner here after described.

The construction of the reinforcement of the flanges, blades, or worms of the screw may be of any or either of the following ways either separately, or in conjunction with each other: The radiating arms f and tangent arms f, Figs. 1 and 2, could be formed of metal rods, bands, wires, strands of wires or the like, the apex of the radiating arms f and the tangent arms f to be secured or fixed to the metal s iralg on the outer circumference of the anges by being twisted, wound around, hooked on or otherwise se.- curely attached, the spiral g being of a round with an irregular surface, so as to prevent a possible slipping or other movement. The opposite ends of the radiating arms f and the tangent arms f are secured in a similar manner by being twisted, wound around, hooked on or otherwise securely attached or fixed to the vertical reinforcement c of the pile-shaft a, or to the metal spirals g encircling the reinforcement of the pile-shaft in the direction of the pitch of the descending screw.

It is desirable that the radiating arms y and the tangent arms f should be securely lixed to insure the rigidity of the reinforcement until the concrete mass becomes thoroughly set and consolidated,but they may be supplemented by others having one end secured to the spiral g and the other end as L, extended and split or expanded or formed as hooks, to become embedded within the concrete mass of the pile-shaft a.

The radiating arms f and tangent arms f might be continued as j, and pass through the reinforcement of the ile-shaft either in a direct line or diagonal y, or otherwise, so as to become partly embedded within the concrete mass of the pile-shaft a or to be at- Lmanner previously described. In addition thereto' radiating arms 7' passing through lthe concretepile-mass and radiatmg armsk having forked expanded or hooked inner ends embedded in the concrete pile-mass,

may be used, as shown in Fig. l and Fig. 2. The radiating and tangential reinforcement ofthe worms, blades or flanges of the screw e lmay beI formed with continuous metal rods, wires, bands, strands of wire or the like secured and attached as previously described. Y

'The piles are preferably vprovided with a steel-point i and with a steel-rod or bolt i having a forked upper end in conjunction with the metal envelop or casing forming a mold, into which the lower part of the pile is embedded.

Figs. 3, 4 and 5 are elevations of the improved design for the pile to suit varying circumstances and requirements. A, is the worm of the screw of any pitch or length; B, point of the screw; C, the shaft of the pile of any convenient length; D, one or more fiat sides; E, one or more key ways; F, one or more projections.

I claim: .1. A concrete pile, column or the like, comprising a reinforced v concrete shaft, screw-threads formed on said shaft, and reinforced by metalrods or the like, a helical coil reinforcing said shaft and wound in a direction reverse to that of the screw-thread,

and radiatin and tangent arms connecting the helical coll with the reinforcing rods of the screw-threads.

2. A concrete pile, column or the like, comprising a reinforced concrete shaft, concrete screw-threads formed on said shaft, reinforcing metal rods or the like carried in said threads near the outer edges of the same, a helical coil reinforcing said shaft, and radiating and tangent arms between the helical coil and the reinforcing rods of the screw-threads.

,3. A concrete pile, column or the like, comprising a reinforced concrete shaft, a metallic envelop for said shaft, a helical metallic reinforcement on the shaft, a second helical coil Wound in opposite direction to the helical reinforcement around the shaft,

concrete screw-threads having reinforcing rods near their outer edges, and radiating and tangent armsronnecting the helical reinforcement with the reinforcing rods of the screw-threads orl by passing through the shaft, or having ends terminating therein.

4. A concrete pile, column or the like, comprising a reinforced concrete shaft, a reinforcing envelop for said shaft, concrete screw-threads on said shaft having reinforcing rods near their edges, a helical-metallic reinforcing coil on said shaft, a second as my invention, I have signed my name in metallic coil wound in opposite direction to presence of two subscribing witnesses. the first coil and the screw-threads for preventing torsion, and metallic connections be- GEORGE CHARLES VERNON'INKPEN' 5 tween the helical and anti-torsional coils and Witnesses:

the reinforcing rods of the screw-threads. A. ETHELBERT Moo'm,

In testimony, that I claim the foregoing ROBERT VERNoN-INKPEN. 

